Edward Gerrard Montgomery
B. G. C. Bolland
G. E. Thompson
United States. Seed and Plant Introduction and Distribution
United States. Bureau of Plant Industry. Office of Grain Investigations
George Leslie Bidwell
Carleton R. Ball
Geo. K. Helder
Unknown Author
H. M. Cottrell
E. F. Chilcott
A. T. Peters
H. W. Cave
Raymond Brown Becker
Carl P. Thompson